Struct EffectiveMotion 

pub struct EffectiveMotion { /* private fields */ }

The motion a widget may play: the Motion tokens with the person’s reduced-motion setting applied. Read through crate::Theme::motion; it is the one place reduced motion is decided, so every widget and the shell’s chrome follow the same rule (HIG §9.7, design-language “Motion”):

• Movement — a slide, a scale, a spring, a snap, an overshoot — lands at once (Self::movement is zero, Self::moves is false).
• A change of what is shown may still cross-fade, at most fast (Self::fade): opacity carries the change without anything moving.
• A looping indicator (spinner, busy arc, sweeping bar) stands still (Self::loops is false); progress and status keep updating.

Reduced motion never stops the frame pump: a widget that settles asks for no frames, and one that still has a fade or new content to show gets them.

Implementations

impl EffectiveMotion

pub const fn new(tokens: Motion, reduced: bool) -> EffectiveMotion

pub const fn reduced(self) -> bool

Whether movement is off: the person asked for reduced motion, or the theme holds still (Motion::still).

pub const fn still(self) -> bool

Whether the theme holds still: no movement and no fade.

pub const fn moves(self) -> bool

Whether anything may move: false under reduced motion.

pub const fn loops(self) -> bool

Whether a looping indicator animates; under reduced motion it draws its resting mark.

pub fn movement(self, nominal: Duration) -> Duration

How long a movement lasts: nominal, or nothing under reduced motion.

pub fn fade(self, nominal: Duration) -> Duration

How long a cross-fade lasts: nominal, or at most fast under reduced motion, where it stands in for the movement it replaces.

pub fn replacement_fade(self) -> Duration

The cross-fade that replaces a spatial transition under reduced motion: fast, or nothing when motion is on (the movement itself shows the change).

pub fn fast(self) -> Duration

fast as a movement.

pub fn base(self) -> Duration

base as a movement.

pub fn slow(self) -> Duration

slow as a movement.

pub const fn tokens(self) -> Motion

The tokens themselves, for values reduced motion does not change (springs a gesture tracks with, gesture tuning).

pub const fn with_tokens(self, tokens: Motion) -> EffectiveMotion

These tokens instead, with the person’s reduced-motion setting kept: how a component paces its own motion (crate::motion::Feel).

Trait Implementations

impl Clone for EffectiveMotion

fn clone(&self) -> EffectiveMotion

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EffectiveMotion

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for EffectiveMotion

fn default() -> EffectiveMotion

The default tokens with motion on: what a surface uses before it has been drawn with a theme.

impl PartialEq for EffectiveMotion

fn eq(&self, other: &EffectiveMotion) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for EffectiveMotion

impl StructuralPartialEq for EffectiveMotion